ac/dc

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Hello, I have welded DC a Lot. But I haven`t used AC much. Is there a BIG diff. And what is the Difference    Thanks
Reply:I was curious myself and found this info on Millers site.. Penetration: DCEN - Least penetration, AC - medium (can be more spatter also), DCEP - most penetration.        After messing around a bit with mine there is also some difference is ease of starting an arc in DC.
Reply:Depends on the process. AC typically like for stick welding is used to avoid arc blow. Tig ac typ for AL. Give us more info on the process and we can provide more info --Gol'
Reply:for some metals you have no choice. welding aluminum? you need the AC current to break through a layer of oxidation on the surface of the aluminum.http://www.aloumac.ca/
Reply:Originally Posted by blue&grayI was curious myself and found this info on Millers site.. Penetration: DCEN - Least penetration, AC - medium (can be more spatter also), DCEP - most penetration.QUOTE]QUOTE=Matthew;209445]for some metals you have no choice. welding aluminum? you need the AC current to break through a layer of oxidation on the surface of the aluminum.
Reply:" Penetration: DCEN - Least penetration, AC - medium (can be more spatter also), DCEP - most penetration."This is referring to stick welding.I r 2 a perfessional
Reply:Originally Posted by Matthewfor some metals you have no choice. welding aluminum? you need the AC current to break through a layer of oxidation on the surface of the aluminum.
Reply:Thanks, I welded with AC many years ago but I just haven`t used AC since I started using DC, The reason I ask is that was thinking about getting an engine drive and they are cheeper in AC.